FMIC before intake or exhaust! None of these mods are going to give you a substantial bump in hp but keeping your IAT's lower should be priority 1.
I have the Dinan intake btw; slightly better throttle response; no noticable seat of the pants bump in hp tho.
2007 E90 335i, TiAg, 6AT, ZPP, ZSP, ZCW, 6FL, HD
Quaife lsd, ETS fmic, GIAC s/w, Dinan intake/exhaust/oc, Koni/M3 susp, Apex Arc 8, Mich PSS